In general, what has spurred the increased use of renewable energy, and what are the benefits of its use in environmental and economic terms?
What will be an ideal response?
Renewable energy use is growing fast, due to advances in technology and increasing concern over the environmental impacts of fossil fuel combustion. Unlike fossil fuels, renewable sources are inexhaustible on time scales relevant to human societies, and their use will help alleviate air pollution and the greenhouse gas emissions that are driving global warming. Renewable energy can also bring economic benefits. Developing renewables can help diversify an economy's mix of energy, which could decrease price volatility and protect against rapid price increases caused by global political unrest in areas like the Middle East. New energy sources require more hands-on labor than fossil fuel industries and so can create new employment opportunities and sources of income and property tax for local communities.
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How are the levels of carbon dioxide linked to the photic and aphotic zones? How does this relate to
the temperature of the water? What will be an ideal response?
Igneous rocks with a two-stage intrusive-extrusive origin are recognized by a texture that is:
a. aphanitic. b. porphyritic. c. glassy. d. phaneritic. e. pyroclastic.
In the following questions, which of them can be related to Geology?
a. Do you live in a region threatened by landslides, volcanoes, earthquakes, or floods? b. Are you worried about the price of energy or about whether there will be a war in an oil supplying country? c. Do you ever wonder about where the copper in your home's wires comes from? d. Have you seen fields of green crops surrounded by desert and wondered where the irrigation water comes from? e. Would you like to buy a dream house on a beach or near a river? f. All of the above
What percentage of the Earth's land surface is currently covered by glacial ice?
A) 2% B) 10% C) 15% D) 33%